<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>数组练习</title>
	</head>
	<body>
		<script type="text/javascript">
			/*创建数组*/
			//var a1=new Array(1,1);
			var a1=[1,1];
			for(var i=2;i<20;i++){
				a1[i]=a1[i-2]+a1[i-1];
			}
			
			a1.forEach(function (value,index) {
				console.log("a1["+index+"]="+value);
			});
			console.log("------------------------------")
			for(var i=0;i<a1.length;i++){
				console.log("a1["+i+"]="+a1[i]);
			}
			console.log("------------------------------")
			for(var i in a1){
				console.log("a1["+i+"]="+a1[i]);
			}
		</script>
	</body>
</html>
